CSV to JSON — Complete Guide
CSV (Comma-Separated Values) and JSON (JavaScript Object Notation) are both widely used formats for storing and exchanging structured data, but they serve different purposes. CSV is simple and compact, great for spreadsheets and bulk data exports. JSON is hierarchical and expressive, preferred by APIs and modern web applications.
Converting between them is a constant need when moving data between systems — importing spreadsheet data into an application, preparing data for an API, or processing exports from legacy databases. This tool converts CSV to JSON in your browser instantly.
What you can do with CSV to JSON
- Converting spreadsheet exports to JSON for use in web applications or APIs
- Transforming data from CSV databases into a format ready for JavaScript processing
- Preparing bulk data for import into NoSQL databases that use JSON documents
- Prototyping with static JSON data converted from a spreadsheet
- Migrating data between systems that use different formats
How to use CSV to JSON
Paste your CSV data into the input field (include the header row)
The tool treats the first row as the field names for each JSON object
The JSON array output appears automatically — copy it for use in your project
Tips for best results
Make sure your CSV has a header row — the tool uses it to create the JSON property names
Quoted fields containing commas are handled correctly: a value like Smith, John wrapped in quotes stays as one field
Empty cells become empty strings or null in the JSON output
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Frequently asked questions
What if my CSV uses a semicolon instead of a comma as the delimiter?
Some locales and European applications use semicolons as delimiters. If your data uses semicolons, you may need to replace them with commas first, or use the delimiter setting if available.
Are numbers in CSV converted to numbers in JSON?
Depends on the tool. Values that look like numbers may be automatically typed as numbers in JSON, or kept as strings. Check the output and adjust if your application requires specific typing.